./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2088946378 <...> Warning: Permanently added '10.128.1.142' (ED25519) to the list of known hosts. execve("./syz-executor2088946378", ["./syz-executor2088946378"], 0x7fff21a1b140 /* 10 vars */) = 0 brk(NULL) = 0x55558e19b000 brk(0x55558e19bd00) = 0x55558e19bd00 arch_prctl(ARCH_SET_FS, 0x55558e19b380) = 0 set_tid_address(0x55558e19b650) = 279 set_robust_list(0x55558e19b660, 24) = 0 rseq(0x55558e19bca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2088946378", 4096) = 28 getrandom("\x05\xe0\x99\xa5\xac\x43\x29\xb2", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558e19bd00 brk(0x55558e1bcd00) = 0x55558e1bcd00 brk(0x55558e1bd000) = 0x55558e1bd000 mprotect(0x7f16b4f55000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0executing program ) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f16acaa0000 [ 23.683420][ T28] audit: type=1400 audit(1746432756.309:80): avc: denied { execmem } for pid=279 comm="syz-executor208" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 20699119) = 20699119 munmap(0x7f16acaa0000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./bus", 0777) = 0 [ 23.795939][ T28] audit: type=1400 audit(1746432756.429:81): avc: denied { read write } for pid=279 comm="syz-executor208" name="loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 23.797063][ T279] loop0: detected capacity change from 0 to 40427 [ 23.824737][ T28] audit: type=1400 audit(1746432756.429:82): avc: denied { open } for pid=279 comm="syz-executor208" path="/dev/loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 23.842285][ T279] F2FS-fs (loop0): heap/no_heap options were deprecated [ 23.866600][ T28] audit: type=1400 audit(1746432756.429:83): avc: denied { ioctl } for pid=279 comm="syz-executor208" path="/dev/loop0" dev="devtmpfs" ino=118 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 23.871019][ T279] F2FS-fs (loop0): heap/no_heap options were deprecated [ 23.904566][ T28] audit: type=1400 audit(1746432756.459:84): avc: denied { mounton } for pid=279 comm="syz-executor208" path="/root/bus" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 23.913903][ T279] ================================================================================ [ 23.951748][ T279] UBSAN: shift-out-of-bounds in fs/f2fs/super.c:919:5 [ 23.959289][ T279] shift exponent 149 is too large for 64-bit type 'unsigned long' [ 23.970630][ T279] CPU: 0 PID: 279 Comm: syz-executor208 Not tainted 6.1.134-syzkaller-00033-g0c1a07d9c284 #0 [ 23.981564][ T279] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 23.992745][ T279] Call Trace: [ 23.996425][ T279] [ 24.000139][ T279] __dump_stack+0x21/0x24 [ 24.005046][ T279] dump_stack_lvl+0xee/0x150 [ 24.010006][ T279] ? __cfi_dump_stack_lvl+0x8/0x8 [ 24.015684][ T279] ? __kasan_slab_free+0x11/0x20 [ 24.020938][ T279] dump_stack+0x15/0x24 [ 24.025565][ T279] ubsan_epilogue+0xe/0x40 [ 24.030275][ T279] __ubsan_handle_shift_out_of_bounds+0x37c/0x400 [ 24.037745][ T279] ? match_int+0x13c/0x190 [ 24.042343][ T279] parse_options+0x4829/0x4830 [ 24.047909][ T279] ? do_new_mount+0x25a/0xa20 [ 24.053919][ T279] ? default_options+0xd90/0xd90 [ 24.059060][ T279] ? f2fs_fill_super+0x2245/0x6c70 [ 24.065074][ T279] ? memcpy+0x56/0x70 [ 24.069345][ T279] f2fs_fill_super+0x2281/0x6c70 [ 24.074484][ T279] ? __cfi_f2fs_fill_super+0x10/0x10 [ 24.079991][ T279] ? mutex_unlock+0x89/0x220 [ 24.084640][ T279] ? set_blocksize+0x1df/0x360 [ 24.089600][ T279] ? sb_set_blocksize+0xaa/0xf0 [ 24.094721][ T279] ? __cfi_f2fs_fill_super+0x10/0x10 [ 24.100276][ T279] mount_bdev+0x2bc/0x3f0 [ 24.106011][ T279] ? __cfi_f2fs_fill_super+0x10/0x10 [ 24.111757][ T279] f2fs_mount+0x34/0x40 [ 24.116379][ T279] legacy_get_tree+0xfe/0x1a0 [ 24.121073][ T279] ? __cfi_f2fs_mount+0x10/0x10 [ 24.126297][ T279] vfs_get_tree+0x9a/0x270 [ 24.131347][ T279] do_new_mount+0x25a/0xa20 [ 24.136287][ T279] path_mount+0x675/0x1010 [ 24.140809][ T279] ? user_path_at_empty+0x161/0x1c0 [ 24.146298][ T279] __se_sys_mount+0x318/0x380 [ 24.150995][ T279] ? __x64_sys_mount+0xd0/0xd0 [ 24.156035][ T279] ? fpregs_restore_userregs+0x128/0x260 [ 24.162350][ T279] __x64_sys_mount+0xbf/0xd0 [ 24.166954][ T279] x64_sys_call+0x65d/0x9a0 [ 24.172253][ T279] do_syscall_64+0x4c/0xa0 [ 24.178634][ T279] ? clear_bhb_loop+0x15/0x70 [ 24.183863][ T279] ? clear_bhb_loop+0x15/0x70 [ 24.189605][ T279] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.196215][ T279] RIP: 0033:0x7f16b4edecfa [ 24.201330][ T279] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 24.222102][ T279] RSP: 002b:00007ffdd9d29898 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 24.230961][ T279] RAX: ffffffffffffffda RBX: 00007ffdd9d298b0 RCX: 00007f16b4edecfa [ 24.241652][ T279] RDX: 0000200000000140 RSI: 0000200000000200 RDI: 00007ffdd9d298b0 [ 24.251320][ T279] RBP: 0000200000000200 R08: 00007ffdd9d298f0 R09: 00000000000054ff [ 24.264951][ T279] R10: 0000000000000000 R11: 0000000000000286 R12: 0000200000000140 [ 24.274542][ T279] R13: 00007ffdd9d298f0 R14: 0000000000000003 R15: 0000000000000000 [ 24.282927][ T279] mount("/dev/loop0", "./bus", "f2fs", 0, "fastboot,background_gc=sync,no_heap,grpjquota=-s.,noquota,disable_roll_forward,noacl,nouser_xattr,ch"...) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 24.286982][ T279] ================================================================================ [ 24.300007][ T279] F2FS-fs (loop0): Not support 2097152, larger than 256 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++